diff --git a/misc/mbuffer/Makefile b/misc/mbuffer/Makefile
--- a/misc/mbuffer/Makefile
+++ b/misc/mbuffer/Makefile
@@ -1,11 +1,11 @@
 # Created by: Rong-En Fan <rafan@FreeBSD.org>
 
 PORTNAME=	mbuffer
-PORTVERSION=	20200929
+PORTVERSION=	20210328
 CATEGORIES=	misc
 MASTER_SITES=	http://www.maier-komor.de/software/mbuffer/
 
-MAINTAINER=	ports@FreeBSD.org
+MAINTAINER=	loader@FreeBSD.org
 COMMENT=	Tool for buffering data streams
 
 LICENSE=	GPLv3+
@@ -13,7 +13,7 @@
 
 TEST_DEPENDS=	gtar:archivers/gtar
 
-USES=		localbase ssl tar:tgz
+USES=		localbase ssl tar:tgz autoreconf gmake
 
 GNU_CONFIGURE=	yes
 
diff --git a/misc/mbuffer/distinfo b/misc/mbuffer/distinfo
--- a/misc/mbuffer/distinfo
+++ b/misc/mbuffer/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1608187011
-SHA256 (mbuffer-20200929.tgz) = 53a6e3c14e9a049f18a09840653dd84f18e7ec7560f2dcf2b61c0ab5f0ead4e8
-SIZE (mbuffer-20200929.tgz) = 147855
+TIMESTAMP = 1621234873
+SHA256 (mbuffer-20210328.tgz) = 51b5b8d8488991a55fe1dfce90130f9e47bc1ce286ba03b4f628c04b784fdc5d
+SIZE (mbuffer-20210328.tgz) = 148009
diff --git a/misc/mbuffer/files/patch-Makefile.in b/misc/mbuffer/files/patch-Makefile.in
deleted file mode 100644
--- a/misc/mbuffer/files/patch-Makefile.in
+++ /dev/null
@@ -1,40 +0,0 @@
---- Makefile.in.orig	2020-09-29 20:57:02 UTC
-+++ Makefile.in
-@@ -42,26 +42,19 @@ TAR		= @TAR@
- 
- TARGET		= mbuffer$(EXE)
- SOURCES		= log.c network.c mbuffer.c hashing.c input.c common.c settings.c globals.c
--OBJECTS		= $(SOURCES:%.c=build/%.o)
--DEPS		= $(SOURCES:%.c=build/%.d)
-+OBJECTS		= $(SOURCES:.c=.o)
- 
- TESTTREE	= /bin /usr/bin
- 
- .PHONY: clean all distclean install check testcleanup
- 
--all: $(TARGET) idev.so tapetest.so have-af
-+all: $(TARGET) idev.so have-af
- 
--$(OBJECTS): config.h Makefile
-+$(OBJECTS): config.h version.h Makefile
- 
- build:
- 	mkdir build
- 
--build/%.o: %.c
--	$(CC) $(CFLAGS) -c $< -o $@
--
--build/%.d: %.c
--	$(CC) -MM -MG -MT $(@:%.d=%.o) $(CFLAGS) $< -o $@
--
- always:
- 
- version.h: always
-@@ -195,7 +188,3 @@ tapetest.so: tapetest.c config.h
- 
- idev.so: idev.c config.h
- 	$(CC) $(CFLAGS) -shared -g -fPIC idev.c -o $@ $(LIBS)
--
--$(DEPS): | build
--
--include $(DEPS)
diff --git a/misc/mbuffer/files/patch-configure b/misc/mbuffer/files/patch-configure
deleted file mode 100644
--- a/misc/mbuffer/files/patch-configure
+++ /dev/null
@@ -1,113 +0,0 @@
-Remove objdump symbol names check. objdump is not available on all
-architectures and the symbol names are unlikely to ever change from
-their visible names on FreeBSD.
-
---- configure.orig	2020-09-29 20:57:02 UTC
-+++ configure
-@@ -625,8 +625,6 @@ LIBOBJS
- AUTOCONF
- DEBUG
- ALLOCA
--ac_ct_OBJDUMP
--OBJDUMP
- AWK
- MT
- CP
-@@ -4649,97 +4647,6 @@ fi
- 
- 
- 
--for ac_prog in gobjdump objdump
--do
--  # Extract the first word of "$target_alias-$ac_prog", so it can be a program name with args.
--set dummy $target_alias-$ac_prog; ac_word=$2
--{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
--$as_echo_n "checking for $ac_word... " >&6; }
--if ${ac_cv_prog_OBJDUMP+:} false; then :
--  $as_echo_n "(cached) " >&6
--else
--  if test -n "$OBJDUMP"; then
--  ac_cv_prog_OBJDUMP="$OBJDUMP" # Let the user override the test.
--else
--as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
--for as_dir in $PATH
--do
--  IFS=$as_save_IFS
--  test -z "$as_dir" && as_dir=.
--    for ac_exec_ext in '' $ac_executable_extensions; do
--  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
--    ac_cv_prog_OBJDUMP="$target_alias-$ac_prog"
--    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
--    break 2
--  fi
--done
--  done
--IFS=$as_save_IFS
--
--fi
--fi
--OBJDUMP=$ac_cv_prog_OBJDUMP
--if test -n "$OBJDUMP"; then
--  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $OBJDUMP" >&5
--$as_echo "$OBJDUMP" >&6; }
--else
--  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
--$as_echo "no" >&6; }
--fi
--
--
--  test -n "$OBJDUMP" && break
--done
--if test -z "$OBJDUMP"; then
--  if test "$build" = "$target"; then
--    ac_ct_OBJDUMP=$OBJDUMP
--    for ac_prog in gobjdump objdump
--do
--  # Extract the first word of "$ac_prog", so it can be a program name with args.
--set dummy $ac_prog; ac_word=$2
--{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
--$as_echo_n "checking for $ac_word... " >&6; }
--if ${ac_cv_prog_ac_ct_OBJDUMP+:} false; then :
--  $as_echo_n "(cached) " >&6
--else
--  if test -n "$ac_ct_OBJDUMP"; then
--  ac_cv_prog_ac_ct_OBJDUMP="$ac_ct_OBJDUMP" # Let the user override the test.
--else
--as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
--for as_dir in $PATH
--do
--  IFS=$as_save_IFS
--  test -z "$as_dir" && as_dir=.
--    for ac_exec_ext in '' $ac_executable_extensions; do
--  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
--    ac_cv_prog_ac_ct_OBJDUMP="$ac_prog"
--    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
--    break 2
--  fi
--done
--  done
--IFS=$as_save_IFS
--
--fi
--fi
--ac_ct_OBJDUMP=$ac_cv_prog_ac_ct_OBJDUMP
--if test -n "$ac_ct_OBJDUMP"; then
--  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OBJDUMP" >&5
--$as_echo "$ac_ct_OBJDUMP" >&6; }
--else
--  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
--$as_echo "no" >&6; }
--fi
--
--
--  test -n "$ac_ct_OBJDUMP" && break
--done
--
--    OBJDUMP=$ac_ct_OBJDUMP
--  else
--    OBJDUMP=""
--  fi
--fi
- 
- 
- 
diff --git a/misc/mbuffer/files/patch-configure.in b/misc/mbuffer/files/patch-configure.in
new file mode 100644
--- /dev/null
+++ b/misc/mbuffer/files/patch-configure.in
@@ -0,0 +1,30 @@
+- AC_PATH_PROG(SH,bash sh)
+  this only checks whether bash exists in ${PATH}, not sh
+  AC_PATH_PROGS() is suppose to check for each program in the blank-separated list,
+  and there is no bash in the FreeBSD base system.
+
+- AC_CHECK_TARGET_TOOLS(OBJDUMP,gobjdump objdump)
+  /usr/bin/objdump (the GNU version) was removed from the FreeBSD base system
+  https://cgit.freebsd.org/src/commit/?id=0ad202f312f6da4f2774ecb7a3f3c2a05b3dde5f
+  add llvm-objdump to the list for ${OBJDUMP}.
+
+--- configure.in.orig	2021-01-16 05:20:02 UTC
++++ configure.in
+@@ -104,7 +104,7 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])],
+ AC_SUBST(CFLAGS)
+ 
+ AC_PROG_INSTALL
+-AC_PATH_PROG(SH,bash sh)
++AC_PATH_PROG(SH,sh)
+ AC_PATH_PROG(RM,rm)
+ AC_PATH_PROG(CP,cp)
+ AC_PATH_PROG(MT,mt,AC_MSG_WARN(could not find the program mt - you might need this if you want autoloader support))
+@@ -113,7 +113,7 @@ AC_PATH_PROG(AWK,awk)
+ AC_SYS_LARGEFILE
+ AC_STRUCT_ST_BLKSIZE
+ 
+-AC_CHECK_TARGET_TOOLS(OBJDUMP,gobjdump objdump)
++AC_CHECK_TARGET_TOOLS(OBJDUMP,gobjdump objdump llvm-objdump)
+ 
+ AC_HEADER_ASSERT
+ AC_CHECK_LIB(pthread, pthread_mutex_init)